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Ultrasonic chemical coloring method for stainless steel

A chemical coloring and ultrasonic technology, applied in the direction of chromate treatment, can solve the problems of unsatisfactory stainless steel coloring effect, and achieve the effect of improving coloring production efficiency, uniform edge color and comprehensive performance improvement.

Inactive Publication Date: 2015-01-21
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these pretreatments and pretreatments have improved the uniformity of the stainless steel coloring film to varying degrees, the effect of stainless steel coloring is still unsatisfactory, and the uniformity of the stainless steel coloring film needs to be further improved to meet the growing material life needs.

Method used

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  • Ultrasonic chemical coloring method for stainless steel
  • Ultrasonic chemical coloring method for stainless steel
  • Ultrasonic chemical coloring method for stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] First, the polished stainless steel workpiece is pretreated, after degreasing, washing and activation, it is ready for use, and the frequency of the ultrasonic generator is adjusted to 300kHz, and the sound intensity is 3.0kW / m 2 , the coloring temperature is 65°C, pour the chemical coloring liquid into the corrosion-resistant container and then place it in the liquid medium (water) of the ultrasonic generator, and start coloring when the temperature of the coloring liquid reaches the set temperature. Among them, the ultrasonic transducer is at the bottom of the container and acts in parallel with the stainless steel workpiece. The coloring potential of chemical coloring is 0.1894V, the terminal potential is 0.1784V, and the coloring potential difference △Φ=11mV. After hardening and sealing treatment, uniform color, edge and overall Blue stainless steel with no color difference. After magnifying 100 times with a polarizing microscope, it can be seen that compared with the...

Embodiment 2

[0036] The polished stainless steel workpiece is pretreated first, after degreasing, washing and activation, it is ready for use, and the frequency of the ultrasonic generator is adjusted to 135kHz, and the sound intensity is 8.0kW / m 2 , the coloring temperature is 50°C, pour the chemical coloring liquid into the corrosion-resistant container and then place it in the liquid medium (water) of the ultrasonic generator, and start coloring when the temperature of the coloring liquid reaches the set temperature. Among them, the ultrasonic transducer is at the bottom of the container and acts perpendicular to the stainless steel workpiece. The coloring potential of chemical coloring is 0.1895V, the terminal potential is 0.1695V, and the coloring potential difference △Φ=20mV. After hardening and sealing treatment, uniform color, edge and overall Gold-yellow stainless steel with no color difference. After magnifying 100 times with a polarizing microscope, it can be seen that compared ...

Embodiment 3

[0038] The polished stainless steel workpiece is pretreated first, after degreasing, washing and activation, it is ready for use, and the frequency of the ultrasonic generator is adjusted to 50kHz, and the sound intensity is 5.0kW / m 2 , the coloring temperature is 50°C, the chemical coloring liquid is directly added to the ultrasonic generator whose inner wall is coated with a corrosion-resistant coating, and the coloring is carried out when the temperature of the coloring liquid reaches the set temperature. Among them, the ultrasonic transducer is at the bottom of the container and acts in parallel with the stainless steel workpiece. The coloring potential of chemical coloring is 0.1891V, the terminal potential is 0.1651V, and the coloring potential difference △Φ=24mV. After hardening and sealing treatment, uniform color, edge and overall Fuchsia stainless steel with no color difference. After magnifying 100 times with a polarizing microscope, it can be seen that compared wit...

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Abstract

The invention discloses an ultrasonic chemical coloring method for stainless steel. The method comprises the following steps of: pre-treating the polished stainless steel, performing chemical coloring under ultrasonic irradiation conditions of certain temperature, frequency and sound intensity, and implementing coloring of different colors by controlling potential difference. The method is low in coloring temperature, short in coloring time and wide in color range; and comprehensive performance such as brightness, abrasion resistance and corrosion resistance of the colored stainless steel is remarkably improved.

Description

technical field [0001] The invention relates to a stainless steel chemical coloring method, in particular to an ultrasonic chemical coloring method for coloring stainless steel by regulating the frequency, sound intensity and coloring temperature of ultrasonic waves. technical background [0002] Stainless steel has excellent corrosion resistance, wear resistance and toughness, and has been widely used in many fields of the national economy. Through coloring treatment, a colored film is formed on the surface of stainless steel, which not only maintains the original advantages of stainless steel, but also has better corrosion resistance, wear resistance and decorative effects than ordinary stainless steel. At present, the coloring methods of colored stainless steel mainly include chemical oxidation coloring method, electrochemical coloring method, ion deposition method, high temperature oxidation method and gas phase cracking method, etc., acid chemical coloring method and ot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/38
Inventor 薛永强鞠洪斌崔子祥赵红吉可明
Owner TAIYUAN UNIV OF TECH
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